website: add Kubeflow MCP Server subproject

[George4177]

Summary

• add Kubeflow MCP Server to the Kubeflow Subprojects navigation
• add concise Overview and Getting Started pages based on the project's current README
• link the upstream GitHub repository using the existing external-navigation pattern

Why

Kubeflow MCP Server is an official subproject with its own repository and KEP,
but it is currently missing from the Kubeflow website's subproject navigation.
This gives users a discoverable entry point without duplicating the full upstream
reference documentation.

Closes kubeflow/mcp-server#54.

Verification

• git diff --check
• Hugo Extended 0.124.1 full site build with the pinned Docsy submodule
• inspected generated MCP Server section navigation and pages

[google-oss-prow]

Hi @George4177. Thanks for your PR.

I'm waiting for a kubeflow member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[google-oss-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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Once this PR has been reviewed and has the lgtm label, please assign chasecadet for approval. For more information see the Kubernetes Code Review Process.

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[github-actions]

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[Arhell]

/ok-to-test

[jaiakash]

Hi @George4177 Thanks for this. Can you please check the review comments.

cc @abhijeet-dhumal @Krishna-kg732

[George4177]

Thanks for updating the title to website: add Kubeflow MCP Server subproject, @juliusvonkohout.

The current-title validation run 29998372898 succeeded. However, rerunning the earlier workflow 29899887895 reused its original docs: title payload and left the PR's latest validate-pr-title check failing. I do not have repository admin rights to rerun the current-title workflow.

Could a maintainer please rerun run 29998372898, or otherwise retrigger PR title validation, so the stale failure is replaced? No code or title changes are needed.